How audio is recorded is crucial, but how it is played is just as important. For people who take audio quality seriously, an equalizer is a valuable investment for home stereo or car use. It may look and sound like a very complicated piece of equipment, but it serves a pretty simple function. Equalizers allow you to adjust the volume of different frequencies that are produced by an audio source. In addition to basics like controlling bass and treble, equalizers allow you to remove unwanted background noise. That means that with an equalizer, your audio can sound as good as you want it to.
Equalizers are good to have in your home or car systems, for a variety of reasons. One of the major considerations with music is the acoustics of the place you’re listening in. You can’t change the layout of your room or get rid of outside noise while driving, but you can equalize the audio for a cleaner sound. If you’re looking for equalizers for your car, these are a few good options.
1. Massive Audio EQ-7X Car Equalizer with 7 Band Graphic Equalizer
This graphic car audio equalizer from Massive Audio is available for 4, 7, or 9 bands. It has an auxiliary input for connecting a variety of devices, and gold-plated RCA connectors for premium sound quality.
Pros: Gold connectors, variety of controls like master volume and subwoofer.
Cons: Some found the LED display too bright.

2. BOSS Audio AVA1210 7 Band Pre-Amp Car Equalizer
This car equalizer from Boss Audio is available as either a 4 or 7 band EQ. It has an input selector for Aux or CD, and switches for precise subwoofer control. It has a high headroom to reduce signal overload, and it’s designed to be able to cut distortion.
Pros: 7 bands, precise controls.
Cons: Blue indicators may be too bright at night.

3. Power Acoustik PWM-16 Pre-Amp Equalizer
This amp has 4-band controls, as well as independent volume and fader controls. It can be a good way to bring boost bass, or just improve the overall sound quality. You can also use it to connect with a Bluetooth adapter.
Pros: Improves sound quality and control, can be connected using a Bluetooth adapter.
Cons: Has 4 bands, rather than the other options’ 7.
